Like most things having to do with sex [in Japan, online], many of these websites are likely disguised-advertising. Do not take all info and reviews at face value.
- Mabe Navi: information on Happening Bars and Couple Kissa. 🇯🇵
- HappeningBar.jp: listing of Happening Bars. 🇯🇵
- TokyoUpdate.jp: articles and reviews on adult nightlife spots in Tokyo (mostly behind a paywall). Ostensibly featuring reviews by women as well as men. 🇯🇵
- HappyHotel.jp: directory of Japanese Love Hotels with advanced search options. Can only be accessed from Japan (or using a VPN). 🇯🇵